(Doctor Strange & the Sorcerers Supreme I#1) -
After Camelot sorcerer Merlin traveled to the present day to inform
Sorcerer Supreme Dr. Strange that a darkness unleashed in the present
day was affecting the Camelot era, Merlin led Dr. Strange into the
Backroads of Time, warning him of the "memory leeches." Revealing that
he was aware that the creatures fed on memories, Dr. Strange informed
Merlin that he was familiar with the creatures and their base of
operations within the Backroads of Time. Merlin commended Dr. Strange
on his knowledge of the "memory leeches" and asked if Strange's axe
worked better than the present day state of magic. Strange followed up,
admitting that he hated time travel, and threatened to the sick the
"memory leeches" on Merlin if Merlin didn't explain why they had
ventured into the Backroads of Time.

Comments: Created by Robbie Thompson, Javier
Rodriguez and Alvaro Lopez.

The "memory leeches" appeared to be neverending so
their average height was impossible to determine.